Clamp



Jan. 15, 1935;

L. ELLIS CLAMP Filed Feb. 27, 1933 Patented Jan. 15, 1935 new Thisinvention relates toimprovements inga clamp. 1'"; 1 I 9 One of the .mainobjects-of :thisinvention-is to provide a clamp whiclipis asimplev andeconomical in construction, so that it can bemanue factured and' 1placed. on ;.the market at a: minim mum of. cost; and"'which-atthe-'same time is strong and durable, so as to be especially adaptedfor" use by toolmake'rs'; machinists, and so forth.

Another object is to provide a strong clamp consisting of only a fewmembers, all of which can be economically made and convenientlyassembled, and which can also be readily disassembled, so that anymember can be quickly replaced if necessary. g

A further object is to provide a clamp which can be conveniently andeasily manipulated; and wherein one jaw is tiltable relative to theother, so that they will readily position themselves to fit exactly andinstantly upon the surfaces of pieces of work placed therein, whetherparallel or not; and wherein the precise fitting on the work is notdisturbed by the tightening of the clamp; and the work pieces can beclamped tightly together, no matter how thin the same may be. 1

A still further object is to provide such a" clamp which can be verytightly applied, to suit the various demands, and wherein the clamp isadapted to be fully snugged or tightened by hand for substantially allwork, and either nut may bealso additionally tightened by the use of awrench or; pliers, and also by a lever bar.

These and various other objects and advantages will become apparent fromthe following description, taken in connection with the accompanyingdrawing, in which the invention is shown in its preferred form, it beingunderstood that various other arrangements and forms of construction maybe resorted to for carrying. out the objects and purposes of thisinvention.

In the drawing:

Fig. 1 is a longitudinal central section through my improved clamp,showing the jaws slightly g UN [TEDISLTATES1 their forward orgrippingendSlO andgll' beveled, in the usual manner; v 1 .-.A front boltor screw .12- and .a rear bolt or screw 131 are mounted in suitablebores or. open-i ings l4 and 15Iprovi'cledqin the lower jawll, to extendupwardly therefrom, and-they preferably have their lower-ends fiushwiththe .lower face through the lower jaw and through the bolts wherein pins16 are insertedwith a driving fit, so that they are normally held inposition therein but are adapted to be driven therefrom when it isdesired to remove the bolts.

The upper jaw 10 is provided with flared openings or apertures 18 and 19through which bolts 12 and 13 extend, said apertures being preferablyflared from their middle part outwardly to both ends thereof, asindicated in the] drawing. With this arrangement the upper jaw is freelymovable on the bolts for placing it in positionon the work, and it isalso tiltable thereon so that the jaws are free to fit. exactly and ofwork placed therein, whether the same be parallel or not.

instantly upon the outer surfaces of the pieces A pair of nuts orclamping elements are and operated on bolt 12,above jaw 10; and a vnut21 which is hexagonal or angular on its exterior and is mounted on bolt13, to be oper ated between the jaws. Holes 22 are provided in the wingsof nut'20, and holes. 23 are pro vided in angular nut 21, so that asuitable rod or bar 24 may be placed in said holes to enable turningeither of said nuts or 21 with greater force; and it is apparent thatthese nuts are also properly arranged to be engaged and operated bymeans of a wrench as well as by pliers.

A pair of notches 25 are provided at the rear ends in the adjacent facesof jaws wand 11, so that nut 21 may be contained therein, where by thejaws are adapted to be brought into complete and close contact withtheir adjacent faces,

and are thereby adapted to clamp work pieces of very thin material.

With this disclosed form of construction only a few parts or members arerequired to make my improved clamp, said members being plain anddurable, thus effecting utmost simplicity and economy and also greatdurability, and the parts are separable so as to provide for replacingthe same. The upper -jaw is freely tiltable relative to the lower 'jawso that the jaws-"will readilyw assume their proper position on the workpieces, and they will fit-exactly and instantly uponthe outersurfaces'of any work, whether the same are parallel or not.; Herein theupper jaw 10* is placed in position on the work, and-;,nutji23y is theneasily spun to contact with said jawand act as the fulcrum therefor;whereupon "the wing nut is turned or spun by hand, without losingtheprecision of contact with the work. The

wing' nut is heavy enough and the 1 wingsare long enough to provide'forrapid spinning'thereof and for good: leverage, and under normalconditions it can: be tightehedfirmly by hand to produce a. tightclamping .efiect; however, this wing. nutfasewell as the angular nut,are

both shaped and adapted for the additional use of a 'wrench' aswellaspliers, and furthermore arealso'arranged for use of a lever bar toeflect extremely tight clamping of the jaws upon the work.

I claim:

A'cla'mp consisting of an upper and a lower jaw having straightinnerfaces provided at the.

rear end with corresponding notches, the upper jaw being providedwithflared openings, a pair of bolts mounted in the lower jaw to be fiushwith the bottom thereof, thereby providing a smooth and unobstructedleye'l bottom on the clamp adaptingit to be rested thereon ona levelsurface, elements mounted with a driving fit I tin/said bolts and lowerjaw for securing said bolts rigidly but removably in said jaw, a wingnut mounted on the forward bolt upon the upper ja'w,and a nut withangular exterior mounted FENWICK L. ELLIS.

.on the other bolt and positioned'within said notches intermediate thejaws to facilitate

